Mitotic stage are not observed in…

BOTANY EMCET 

2022 MODEL QUESTIONS

1. In ‘S’ phase of the cell cycle

1) chromosome number is increased.
2) amount of DNA is reduced to-half in each cell.
3) amount of DNA doubles in each cell.
4) amount of DNA remains same in each cell.

2. The enzyme recombinase is requ ired at which state of meiosis

1) Diplotene 2) Diakinesis
3) Pachytene 4) Zygotene

3. would normally procee to mitosis without interruptions

a) once it had started the S-period
b) once it had entered the G -phase
c) at anytime during cell division
d) None of the above

4. Meiosis takes place in

a) Megaspore b) Meiocyte
c) Conidia d) Gemmule

5. The complex formed by a pair of synpased homologous Chro mosomes is called ?

1) Axoneme 2) Equtorial plate
3) Kinetochore 4) Bivalent

6. Identify the meiotic stage in which the homologous chromo somes separate while the sister chromatids remain associated at their centromeres.

a) Metaphase I b) Metaphase II
c) Anaphase I d) Anaphase II

7. Given below is the representa tion of a certain event at a par ticular stage of a type of cell division. Which is this stage?

a) Both prophase and metaphase of mitosis
b) Prophase I during meosis
c) Prophase II during meiosis d) Prophase of Mitosis

8. During gamete formation, the enzyme recombinase participa tes during:

a) Prophase — II
b) Metaphse — I
c) Anaphase — II
d) Prophase — I

9. How many chromosomes will the cell have at G„ after S and after M-phase espectively, if it has 14 chromosomes at interphase?

a) 14, 14, 7 b) 14, 14, 14
c) 7, 7, 7 d) 7, 14,14.

10. The phragmoplast is organized at the

a) beginning of anaphase
b) End of anaphase
c) beginning of telophase
d) end of telophase

11. Colchicine arrests spindle at

a) anaphase b) prophase
c) telophase d) metaphase

12. Which of the protein is found in spindle fibre?

a) Tubulin b) Albumin
c) Mucin d) Hemoglobin.

13. Chromatid formation takes place in

a ) S-phase b) metaphase
c) Go -phag e d) G2- phase

14.Spindle fiber made up of in ?

a) humulin
b)intermediate filament
c) flagellin (d) tubulin

15. Select the correct option with respect to mitosis.

a) Chromatids start moving towards opposite poles in telophase
b) Golgi complex and endopl asmic reticulum are still visible at the end of prophase
c) Ghromosomes move to the spindle equator and get aligned along equatorial plate in metaphase
d) Ghromatids separate but rema ins in the centre of the cell in anaphase

16. Mitotic stage are not observed in

a) Cosmarium b) E. coli
c) Saccharomyces d) Chlorella

17. Meiosis in a plant occurs when there is a change

a) f rom gametophyte to sporo phyte
b) from sporophyte to gameto phyte
c) from gametophyte to gameto phyte
d) from sporophytelo sporo phyte

18. Synaptonemal complex is for med during

a) pachytene b) zygotene
c) leptotene d) diplotene

19. 56 cells are produced in meiosis where first division is

a) equal b) reduction
c) mitosis d) None of these

20. Longest phase of meiosis, is

a) prophase-I b) prophase- II
c) ana -phase-I d) metaphase- II

21 . which stage of the first meiotic division , two sister chromatids are formed?

a)1eptotene b) Zygotene
c) Pachytene d) Diplotene

22. Crossing over is the exchange of genetic meterial between

a) non-sister chromatids of the homologous chromosomes
b) sister chromatids of the homo logous chromosome
c) chromatids of non-homolo gous chromosomes
d) the genes those are completely linked

23. Select the matched ones.

I. S-phase
I. S-phase — DNA replication
II. Zygotene —- Synapsis
III. Diplotene — Crossing over
IV. Meiosis — Both haploid and diploid cells
V. Gc-phase — Quiescent stage
a) I and II only
c) III and V only
b) III and IV only
d) I, III and V onl y

24. The stage between two meiotic division is called

a) interphase b) cytokines
c) interkinesis d) karyokinesis

25. During meiosis, the alleles of the parental pair separate or segregated from each other. How many allele(s) is/are then transmitted to a gamete?

a) Four b) Two
c) Six d) One

26. In which phase DNA content will be doubled ?

a) Interphase b)Anaphase
c) Prophase d) Telophase

27. Which phase comes in between the G, and Go phases of cell cycle?

a) M-phase b) Go-phase
c) S-phase d) I nterphase

28. Cell division can not be stopped in which phase of the cell cycle?

a) G -phase b) Go-phase
c) S-phase d) Prophase

29. Given below is a schematic break-up of the phases/stages of cell cycle.
Which one of the following is the correct indication of the stage/phase in the cell cycle?

a) B—Metaphase
b) C—Karyokinesis
c) D—Synthetic phase
d) A—Cytokinesis

30. During cell cycle, RNA and non-histone proteins are synthesizd in

a ) S-phase b) G0-phase
c) G2 –phase d) M-phase

31. In which phase, proteins for spindle fibre are synthesized?

a) G1 -phase b) G2 -phase
c) S-phase d) Anaphase

32. Which one of the following precedes re-formation of the nuclear envelope during M-phase of the cell cycle?

(a) Decondensation from chromo some and reassembly of the nuclear lamina
b) Transcription from chromo somes and reassembly of the nuclear lamina
c) Formation of the contractile ring and formation of the phrag moplast
d) Formation of the contractile ring and transcription from chromosomes

33. Cells in Go-phase of cell cycle

a) exit cell cycle
b) enter cell cycle
c) suspend cell cycle
d)terminate cell cycle

34. During mitosis, ER and nucleo lus begin to disappear at

a) late prophase
b) early metaphase
c) late metaphas
d) early prophase

35. Which stages of cell division do the following figures ‘A’ and ‘B’ represent respectively?

A) Metaphase — Telophase
B) Telophase— Metaphase
C) Late Anaphase— Prophase
D) Prophase— Anaphase

 

ANSWERS & KEY

1.c 2.c 3. a 4.b
5.d 6.c 7.b 8.d
9.b 10.b 11.d 12.a 13.a 14.d 15.c 16.d
17.b 18.b 19.b 20.a
21.c 22.a 23.a 24.c 25.d 26.a 27.c 28.c 29.c 30.c 31.d 32.a 33.c 34.d 35.c

 

Sabbidi Ramesh

Lecturer in Botany & Neet faculty,
Govt Junior College,
Banswada-
8179227595.